Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations for metal preparation operations and for coating operations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):
Subpart A—BPT Effluent Limitations
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| Metal preparation
| Coating operation
| Metal preparation
| Coating operation
|
|---|
| | Metric units—mg/m
2 of area processed or coated
|
| Chromium | 16.82 | 3.41 | 6.81 | 1.38
|
| Lead | 6.01 | 1.21 | 5.21 | 1.06
|
| Nickel | 56.46 | 11.43 | 40.05 | 8.11
|
| Zinc | 53.26 | 10.78 | 22.43 | 4.54
|
| Aluminum | 182.20 | 36.87 | 74.47 | 15.07
|
| Iron | 112.12 | 22.69 | 56.06 | 11.34
|
| Oil and grease | 800.84 | 162.10 | 480.51 | 97.23
|
| TSS | 1642.00 | 332.20 | 800.90 | 162.00
|
| pH | (
1) | (
1) | (
1) | (
1)
|
| | English Units—pounds per 1 million ft
2 of area processed or coated
|
| Chromium | 3.45 | 0.07 | 1.40 | 0.29
|
| Lead | 1.23 | 0.25 | 1.07 | 0.22
|
| Nickel | 11.57 | 2.34 | 8.20 | 1.66
|
| Zinc | 10.91 | 2.21 | 4.60 | 0.93
|
| Aluminum | 37.32 | 7.55 | 15.26 | 3.09
|
| Iron | 22.96 | 4.65 | 11.48 | 2.32
|
| Oil and grease | 164.03 | 33.19 | 98.42 | 19.92
|
| TSS | 337.00 | 68.10 | 164.00 | 33.20
|
| pH | (
1) | (
1) | (
1) | (
1)
|
authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) (the “Act”);
33 U.S.C. 1311,
1314,
c,
e, 1316 (b) and
c, 1317 (b) and
c,
and; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217
source: 47 FR 53184, Nov. 24, 1982, unless otherwise noted.
cite as: 40 CFR 466.11